Paper Abstract and Keywords |
Presentation |
2017-09-05 15:00
Color group constraint for image smoothing Riku Mikami, Taichi Yoshida, Masahiro Iwahashi (Nagaoka Univ. of Tech.) LOIS2017-25 IE2017-46 EMM2017-54 |
Abstract |
(in Japanese) |
(See Japanese page) |
(in English) |
$L_0$ gradient minimization is a technique that belongs to edge-preserving image smoothing. The objective function of $L_0$ gradient minimization consists of the quadratic data-fidelity and the $L_0$ gradient, which calculates the number of the non-zero gradients of an image, and various methods which approximately minimize it have been proposed. $L_0$ gradient minimization is a powerful tool as edge-preserving image smoothing, but it has an inherent difficulty. Since the free parameter controlling the degree of flatness does not have a physical meaning, its setting is troublesome. To avoid the troublesome work, we propose a method of edge-preserving image smoothing based on the number of color group constraint in this report. We define the color group as a set of pixels which have same pixel values and neighbor each other. The proposed method is strongly related with $L_0$ gradient minimization. Because, since a value of $L_0$ gradient is zero inside a color group, the number of color groups is linearly in proportion to $L_0$ gradient. The proposed method formulates the number of color groups as the control parameter, and the parameter visually has a physical meaning. Through simulations, results of the proposed method is enough smoothed images with preserved edges, compared with state-of-the-art methods of $L_0$ gradient minimization. |
Keyword |
(in Japanese) |
(See Japanese page) |
(in English) |
Edge-preserving image smoothing / $L_0$ gradient minimization / optimization / / / / / |
Reference Info. |
IEICE Tech. Rep., vol. 117, no. 200, IE2017-46, pp. 87-90, Sept. 2017. |
Paper # |
IE2017-46 |
Date of Issue |
2017-08-28 (LOIS, IE, EMM) |
ISSN |
Print edition: ISSN 0913-5685 Online edition: ISSN 2432-6380 |
Copyright and reproduction |
All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034) |
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LOIS2017-25 IE2017-46 EMM2017-54 |
Conference Information |
Committee |
EMM IE LOIS IEE-CMN ITE-ME |
Conference Date |
2017-09-04 - 2017-09-05 |
Place (in Japanese) |
(See Japanese page) |
Place (in English) |
Kyoto Univ. (Clock Tower Centennial Hall) |
Topics (in Japanese) |
(See Japanese page) |
Topics (in English) |
Multimedia Communication/System, Lifelog Applications, IP Broadcasting/Video Transmission, Media Security, etc. |
Paper Information |
Registration To |
IE |
Conference Code |
2017-09-EMM-IE-LOIS-CMN-ME |
Language |
Japanese |
Title (in Japanese) |
(See Japanese page) |
Sub Title (in Japanese) |
(See Japanese page) |
Title (in English) |
Color group constraint for image smoothing |
Sub Title (in English) |
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Edge-preserving image smoothing |
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$L_0$ gradient minimization |
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optimization |
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1st Author's Name |
Riku Mikami |
1st Author's Affiliation |
Nagaoka University of Technology (Nagaoka Univ. of Tech.) |
2nd Author's Name |
Taichi Yoshida |
2nd Author's Affiliation |
Nagaoka University of Technology (Nagaoka Univ. of Tech.) |
3rd Author's Name |
Masahiro Iwahashi |
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Nagaoka University of Technology (Nagaoka Univ. of Tech.) |
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Speaker |
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Date Time |
2017-09-05 15:00:00 |
Presentation Time |
25 minutes |
Registration for |
IE |
Paper # |
LOIS2017-25, IE2017-46, EMM2017-54 |
Volume (vol) |
vol.117 |
Number (no) |
no.199(LOIS), no.200(IE), no.201(EMM) |
Page |
pp.87-90 |
#Pages |
4 |
Date of Issue |
2017-08-28 (LOIS, IE, EMM) |
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